What kind of antifreeze should be used for a 2003 Chevy impala?

A 2003 Chevy Impala should use Dex-Cool antifreeze/coolant. However, it's crucial to check your owner's manual to be absolutely certain. Using the wrong type of antifreeze can damage your engine.

While Dex-Cool is the factory-recommended coolant, some owners have successfully used other types of antifreeze (like traditional green antifreeze) *after* a complete flush and thorough rinsing of the cooling system. However, this is generally not recommended as it can lead to incompatibility issues and reduced cooling efficiency. Sticking with Dex-Cool is always the safest bet.